Howdy! If you feel like going into the sound on sound territory with Reaper (or reajs vst wrapper), a simple js:delay can be supercharged into a sos beast!
If you set the 24th line of code in the js plugin like this:
delaylen=min(slider1 * srate / 1000,4000000);
then your buffer length would be up to a minute! Pair that with careful feedback patching, decent tape emulation or any fx, and a master limiter to protect your speakers, headphones and ears - and you’ve got yourself a nice virtual tape that sounds (to my ears) very close to a real deal. The feedback inside the js:delay should be at zero in this case, as you would be managing feedback outside of the plugin (with levels, compression, etc).
Of course you can use it as clean sos delay. With feedback at zero it will just layer whatever sounds you feed into it, with no decay.
Many many tracks of mine were based around this little delay, but with a 10 seconds buffer. 1 minute opens up a whole world of possibilities.